Helps kill germs, bacteria, and algae, and helps clear the water. The glass tube is made of good-quality Quartz Glass Can be used with aquariums, fish ponds, and swimming pools How to use: Power 1 watt per 1,000 liters of water If the pond is exposed to a lot of sunlight, choose a wattage that is 1 time more than normal. The installation must be placed in the filter compartment or find a place to block the UV light so that the fish cannot see it because UV light affects the fish's eyesight.
